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THE USE OF PHYSICAL MODELING FOR UNDERSEA MINING DESIGN

BICER, N

Conference Object | 1994 | MINE PLANNING AND EQUIPMENT SELECTION 1994 , pp.757 - 764

3rd International Symposium on Mine Planning and Equipment Selection -- OCT 18-20, 1994 -- ISTANBUL, TURKEY WOS: A1994BB59Q00124

THE DYNAMICS OF POSITIVE SOLUTIONS OF A HIGHER ORDER FRACTIONAL DIFFERENCE EQUATION WITH ARBITRARY POWERS

Gumus, Mehmet | Soykan, Yuksel

Article | 2017 | JOURNAL OF APPLIED MATHEMATICS & INFORMATICS35 ( 03.Apr ) , pp.267 - 276

The purpose of this paper is to investigate the local asymptotic stability of equilibria, the periodic nature of solutions, the existence of unbounded solutions and the global behavior of solutions of the fractional difference equation x(n+1) = alpha xn-(k+1)/beta+gamma x(n)(p) (k)x(n)(g)-(k+2), n =0,1... where the parameters alpha, beta, gamma; p, q are non-negative numbers and the initial values x - (k + 2), x -(k + 1),..., x-1; x(0) is an element of R+.

Examining with Discrimanant Analysis the Differences of Automobile Consumers at the Stage of Information Searching in Zonguldak Region

Albayrak, Ali Sait | Aksoy, Ramazan

Article | 2007 | Yönetim Dergisi:İstanbul Üniversitesi İşletme Fakültesi İşletme İktisadı Enstitüsü18 ( 56 ) , pp.40 - 52

Satın alma sürecinde tüketicilerin bilgi edinmeleri aşaması en sorunlu aşamadır. Bu aşamada, tüketiciler hangi bilgi kaynaklarına başvuracağına karar vermede önemli güçlüklerle karşılaşmaktadır. Bu çalışmada otomobil tüketicilerinin cinsiyet, medeni durum, eğitim düzeyi, gelir düzeyi, yaş grubu ve otomobil sahipliliği yönünden bilgi türleri ve bilgi kaynaklan itibariyle farklılık gösterip göstermediği diskriminant analiziyle araştırılmaktadır. Diskriminant analizi, varsayımları (çoklu normal dağılım, eşit kovaryans, çoklu doğrusal bağlantı ve doğrusallık) sağlanması durumunda en uygun sınıflandırma tekniğidir. Diskriminant analizini . . .n sonuçları otomobil tüketicileri arasında cinsiyet, medeni durum, eğitim ve gelir düzeyi, yaş grubu ve otomobil sahipliliği yönünden bilgi türleri ve bilgi kaynakları itibariyle anlamlı farklılıkların olduğunu göstermektedir. Consumers' information search is the most troubled phase of the purchasing decision process. In this phase, consumers have trouble deciding which information type and information source to approach. In this study, whether consumers differ by their sex, marital status, educational level, income level, age group and ownership of goods in respect to their demand for information type and preferred information source is examined with discriminant analysis. When the assumptions (multivariate normality, equal covariance matrices, multicolinearity and linearity) of discriminant analysis are met, then discriminant analysis is the most appropriate classification technique. The discriminant analysis results point out that the discriminant functions of sex, marital status, educational level, income level, age group and ownership of goods in respect to their demand for information type and preferred information source account for a meaningful proportion of the differences among the groups Daha fazlası Daha az

Evaluation of Critical Operational Faults of Marine Diesel Generator Engines by Using DEMATEL Method

Başhan, Veysi | Demirel, Hakan

Article | 2018 | Journal of Eta Maritime Science6 ( 2 ) , pp.119 - 128

All the electrical demand of ship are provided by diesel generators (DG). Failure of generators due to breakdown can lead to the blackout of the ship which may suddenly cause serious damage to ship’s main and/or auxiliary engines, human health and marine environment or any structure at ship’s route. Thus, the planned maintenance and repairs of the generators must be done properly without any deficiency or delay. And even then, since the generators run continuously failures may often occur. In this context, this paper provides a DEMATEL (Decision Making Trial and Evaluation Laboratory) method to evaluate the critical operational faul . . .ts in marine DGs. The DEMATEL method enables to identify and analyze the important faults of marine DG within the respect to the cause-effect relationship diagram. The obtained results of the research will contribute to ship safety at sea and prevention of hazardous machinery effects. Geminin tüm elektriksel gereksinimleri dizel jeneratörler tarafından sağlanmaktadır. Jeneratörlerde meydana gelen arızalar geminin kararmasına (çökmesine) neden olabilir ve bu durum aniden gemi ana makinesi veya yardımcı makinelerinde, insan sağlığına, deniz çevresine veya geminin rotasındaki herhangi bir yapıya ciddi hasarlar verebilir. Bu yüzden, jeneratörlerin planlı bakım ve onarımları düzgün bir şekilde eksiksiz ve zamanında yapılmalıdır. Tüm bunlara rağmen, sürekli çalışan jeneratörlerde arızalar olabilmektedir. Bu kapsamda, bu makale gemi dizel jeneratörlerinde kritik operasyonel arızaları DEMATEL (Karar Verme Deneme ve Değerlendirme Laboratuvarı) metoduyla sunmaktadır. DEMATEL metodu gemi dizel motorlarında meydana gelen önemli arızaları sebep-etki ilişkisi diyagramıyla tanımlanma ve analiz etmeye yaramaktadır. Elde edilen sonuçlar, denizde gemi emniyeti ve tehlikeli makine etkilerinin önlenmesine katkıda bulunacaktır Daha fazlası Daha az

SUFFERING FOR THE SAKE OF COSMIC ORDER: TWELVER SHI?AH ISLAM'S COPING WITH TRAUMA

Shirinov, Agil

Article | 2017 | İlahiyat Studies: A Journal on Islamic and Religious Studies8 ( 1 ) , pp.65 - 93

The relation established in Shi?ite Islam between suffering, cosmicorder, and the position attributed to the Shi?ite community in thiscosmic order, is very important in terms of understanding Shi?iteIslam identity. This article's primary claim is that a deep investigationof Shi?ite-Islam identity should be conducted in the context of itscoping with the trauma of the tragedy of Karbala?. Based on JeffreyAlexander's definition of trauma as a "cultural construction," we claimthat the coding, weighting, and narrating of the Karbala? tragedy inthe course of the trauma process can provide us with important cluesto understand the . . . Shi?ite-Islam identity. This article claims that in theShi?ite identity, the suffering experienced in Karbala? is considered aguarantee that cosmic order will be maintained. Suffering isinterpreted as the cost of the battle between the haqq (truth) and batil(falsehood) and of preserving the right way; thus, suffering is glorifiedand transformed into a social activity of continuous character. In thisway, the Shi?ite community places itself both as "a subject of history"and as a dynamic social tradition. The relation established in Shi?ite Islam between suffering, cosmicorder, and the position attributed to the Shi?ite community in thiscosmic order, is very important in terms of understanding Shi?iteIslam identity. This article's primary claim is that a deep investigationof Shi?ite-Islam identity should be conducted in the context of itscoping with the trauma of the tragedy of Karbala?. Based on JeffreyAlexander's definition of trauma as a "cultural construction," we claimthat the coding, weighting, and narrating of the Karbala? tragedy inthe course of the trauma process can provide us with important cluesto understand the Shi?ite-Islam identity. This article claims that in theShi?ite identity, the suffering experienced in Karbala? is considered aguarantee that cosmic order will be maintained. Suffering isinterpreted as the cost of the battle between the haqq (truth) and batil(falsehood) and of preserving the right way; thus, suffering is glorifiedand transformed into a social activity of continuous character. In thisway, the Shi?ite community places itself both as "a subject of history"and as a dynamic social tradition Daha fazlası Daha az

Clodronic acid in the treatment of postmenopausal osteoporosis

Tanakol R. | Yarman S. | Bayraktaroglu T. | Boztepe H. | Alagöl F.

Article | 2007 | Clinical Drug Investigation27 ( 6 ) , pp.419 - 433

Background: Clodronic acid, a first-generation bisphosphonate, has been successfully used in the treatment of high bone turnover states, Paget's disease and osteolytic bone metastases. However, controversies remain over its optimal dosage and method of administration in the treatment of postmenopausal osteoporosis. In this study we aimed to evaluate the effect of clodronic acid treatment for 3 years on bone mineral density (BMD) in women with postmenopausal osteoporosis. Methods: This was a prospective, open-label, randomised, controlled study that was conducted in an outpatient clinic at the Bone Metabolism Unit of a tertiary refer . . .ral centre university hospital. Thirty postmenopausal women (age range 48-73 years) with osteoporosis and a control group of 49 osteoporotic women (age range 47-74 years) received randomised therapy. The clodronic acid group of participants received oral doses of clodronic acid 800mg plus elemental calcium 500mg and 400IU of vitamin D daily, while the control group was treated with calcium and vitamin D only. BMD was measured by dual energy x-ray absorptiometry at yearly intervals. Biochemical markers of bone turnover were also measured. Results: In this clinical study of postmenopausal women with osteoporosis, 36 months of clodronic acid treatment significantly increased average femoral neck BMD by 3.2 ± 2.9%, trochanter BMD by 2.2 ± 2.9% and lumbar spine BMD by 3.1 ± 3%. In the control group, femoral neck, trochanter and lumbar spine BMD decreased by -6 ± 2.7%, -7.3 ± 2.5% and -5.4 ± 2%, respectively (p < 0.01, p < 0.05 and p < 0.05 for clodronic acid vs control, respectively). There was a significant decrease in urinary hydroxyproline (-38.3%) over 3 years in the clodronic acid group compared with baseline (p < 0.05), while no significant change occurred in the control group. Clodronic acid was well tolerated and compliance was good. There were no clinically meaningful differences in the incidence of individual adverse events between the groups. Conclusion: These results indicate that daily oral administration of clodronic acid 800mg provides benefits to skeletal bone density in osteoporotic postmenopausal women. Calcium and vitamin D supplementation alone did not prevent further bone loss. © 2007 Adis Data Information BV. All rights reserved Daha fazlası Daha az

Ultrastructural observations in somatic embryogenesis of natural tetraploid Trifolium pratense L.

Colgecen, Hatice | Buyukkartal, Hatice Nurhan | Koca-Caliskan, Ufuk

Article | 2016 | TURKISH JOURNAL OF BOTANY40 ( 5 ) , pp.496 - 505

Previous reports of plant regeneration of natural tetraploid T. pratense L. 'Elci' could be realized only through the apical meristem calli. In order to proceed to the production stage, other regeneration methods need to be tried. Aseptic seedlings were used for the production of somatic embryos through various 2,4-D and kinetin trials. Nonuniform external callus cells with translucent cytoplasm were observed in various developmental stages of somatic embryos. Beneath these cells, there were uniformly aligned, dark-stained embryo cells with dense cytoplasm. Despite the similar developmental stages and cell characteristics of zygotic . . . and somatic embryos, the walls of somatic embryo cells revealed a highly wavy pattern. The nucleus generally contained only one nucleolus, which was spherical, dark stained, and electron-dense. Electron-dense droplets were seen in vacuoles. The cytoplasm consisted of starch-containing amyloplasts, mitochondria, plastids, ribosomes, endoplasmic reticulum, dictyosomes, lipid, and protein bodies. In some of the somatic embryos at the globular and heart stages, vacuole or electron-translucent zones were observed in the nucleolus. Additionally, a few embryo degenerations were recorded during developmental stages of the zygotic embryo. For the first time, the somatic embryos of natural tetraploid T. pratense were produced from hypocotyl (85%), cotyledon (75%), and apical meristem (60%) explants in 0.3 mg/L 2,4-D and 2 mg/L kinetin-containing MS medium. Our study developed an effective and efficient in vitro production method for using natural tetraploid T. pratense in biotechnological studies Daha fazlası Daha az

A molecular dynamics study: Structures and thermal stability of PdmPt(13-m)Ag42 ternary nanoalloys

Garip, Ali Kemal

Article | 2018 | INTERNATIONAL JOURNAL OF MODERN PHYSICS C29 ( 9 ) , pp.496 - 505

Structural optimization of ternary PdmPt(13-m)Ag42 nanoalloys was performed using the basin-hopping algorithm, and the Gupta many-body potential was adopted to model interatomic interaction. The optimization results show that all compositions have a structure based on icosahedron with a coreshell segregation. While the Ag atoms prefer to segregate to the surface, Pd and Pt atoms were located at the core of the cluster due to the higher surface and cohesive energy. The single platinum atom with the highest cohesive energy in Pd12Pt1Ag42 nanoalloy was located at the center of the cluster. Also in all other compositions except Pd13Ag42 . . ., Pd atoms occupy the second shell position of the icosahedron structure. We used classical molecular dynamics (MD) simulations in canonical ensemble conditions (NVT) to investigate the melting temperatures of ternary PdmPt(13-m)Ag42 nanoalloys with the interatomic interactions modeled by the same potential with optimizations. The icosahedral structures were taken as the initial configurations for MD simulations. We obtained caloric curves and Lindemann indexes to investigate the melting transitions. The simulation results showed that varying the composition gives rise to a fluctuation in melting temperatures. The highest melting temperature belongs to the Pd9Pt4Ag42 nanoalloy cluster within the other compositions. However, the relative stability investigation indicates the Pd8Pt5Ag42 nanoalloy cluster as the most stable composition. The Lindemann indexes obtained for the second and third shell of icosahedral structures show that the melting takes place as a whole without any surface premelting Daha fazlası Daha az

Comparison of test use and multiple-evaluation to test effectiveness of PBL in different grouping strategies

Yaman, Suleyman

Article | 2011 | ENERGY EDUCATION SCIENCE AND TECHNOLOGY PART B-SOCIAL AND EDUCATIONAL STUDIES3 ( 01.Feb ) , pp.131 - 142

Problem-based learning (PBL) involves the process of working toward the understanding or solution of a problem. In educational contexts, PBL provides meaningful problems to improve learning. This study aims to investigate the comparative effectiveness of the achievement test and of multiple evaluation methods, including test use, self, peer, and tutor-evaluation, in PBL environments. Different grouping strategies, specifically tutor- and student-based selection, are used to test effectiveness of the evaluation approaches. The study was conducted with 46 prospective teachers using an experimental design. For the purpose of the study, . . . t-test for independent groups and correlation analysis were used. The prospective teachers in the tutor-selected group were found to be more successful when the complete results of the evaluations were considered. The use of multiple evaluation methods revealed a significant difference between groups, whereas the approach using only the achievement test did not show any statistically significant difference Daha fazlası Daha az

Air Pollution And The Risk Of Venous Thromboembolism

Tor, M. | Cevik, C. | Kurcer, M. | Akbulut, S. | Altuntas, M. | Atalay, F.

Conference Object | 2010 | AMERICAN JOURNAL OF RESPIRATORY AND CRITICAL CARE MEDICINE181 , pp.131 - 142

WOS: 000208771000726

Classic Kaposi sarcoma with sarcoid-like granulomas: a case report and review of the literature

Kandemir, N. Onak | Yurdakan, G. Gamze | Bektas, S.

Conference Object | 2008 | HISTOPATHOLOGY53 , pp.396 - 397

27th International Congress of the International-Academy-of-Pathology -- OCT 12-17, 2008 -- Athens, GREECE WOS: 000259524800907

Electroconvulsive therapy combined with antipsychotic therapy in the treatment of acute schizophrenia inpatients: symptom profile of the clinical response

Ipekcioglu, Derya | Yazar, Menekse Sila | Canbek, Ozge | Yuksel, Ozge | Meterelliyoz, Kumru Senyasar | Ilnem, Mehmet Cem

Article | 2018 | PSYCHIATRY AND CLINICAL PSYCHOPHARMACOLOGY28 ( 4 ) , pp.363 - 370

OBJECTIVE: The aim of the study was to examine the efficacy of electroconvulsive therapy (ECT) combined with antipsychotic (AP) medication on symptom profile in patients with a diagnosis of schizophrenia who had received acute psychiatric inpatient treatment. METHODS: In this prospective study, patients were evaluated for inclusion in the study who were diagnosed with schizophrenia according to DSM-IV diagnostic criteria and were to receive ECT. The patients were evaluated using the Brief Psychiatric Rating Scale (BPRS), Scale for the Assessment of Positive Symptoms (SAPS), Scale for the Assessment of Negative Symptoms (SANS), and C . . .linical Global Impression - Improvement (CGI-I) sub-scale before the first session ECT, once following every two subsequent sessions and after the final session. RESULTS: The patients showed significant improvements in BPRS scores at each evaluation compared with their scores at baseline, and a significant clinical improvement was found on the CGI-I sub-scale at the end of treatment. Across all SAPS sub-scores, significant decreases were found, and the symptoms related to hallucinations and positive formal thought disorder showed the most rapid response to treatment. Across all SANS sub-scores, significant decreases were found, and affective flattening or blunting symptoms responded most rapidly to treatment. CONCLUSION: One of the most important findings in the present study of hospitalized patients with acute schizophrenia was the good response to treatment, which provided significant improvements in both positive and negative symptoms. The most rapid response to treatment was found for hallucinations, positive formal thought disorder, and affective flattening or blunting symptoms. The most important limitation of our study may be the small number of cases. In future, well-standardized studies using a double-blinded, comparative, prospective design and including a sufficient number of patients are needed Daha fazlası Daha az

6698 sayılı Kişisel Verilerin Korunması Kanunu kapsamında yükümlülüklerimiz ve çerez politikamız hakkında bilgi sahibi olmak için alttaki bağlantıyı kullanabilirsiniz.

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